Originally Posted by Snorkledorf
The Kindle 3 is noticeably faster than the Kindle 2 but it still might be a bit sluggish for quickly flipping through pages the way you'd want to when Photoreading. Presumably by the time the K4 or K5 get here in a year or two they'll have improved the speed some more.
I just did a quick test on my K3 and it took 13 seconds to flip 10 pages at the smallest text size, and 9 seconds at the hugest size.
On my iPad the Kindle app, iBooks, and GoodReader (that I use for reading scanned PDFs, as 2-page spreads) each took about 5 seconds to flip 10 pages. Text size (on the former two) didn't seem to make a difference here.
My clumsy flipping through a paper book 10 times (to show ten 2-page spreads, or 20 pages) took about 8-9 seconds.
Text size is variable on ebook readers, so at a small text size you may be able to get a single "page" on the Kindle or iPad that shows the same amount of text as a 2-page spread in a paper book. So take that into account too.
I might start looking at the iPad for Photoreading now! I'd never really thought about it before.
My 2 cents is that we want to be seeing around 0.5s/page (or 0.5s/screen) or faster to make PhotoReading practical and enjoyable. So the Kindle would need to more than double its speed again to make that work.
For me the fastest thing is to use my computer with a PDF. You can slide through the pages super fast that way, and you can see a lot of text per screen. But the iPad is a close second.
Even if it's practical for e-ink technology to reach that speed, which I have some doubts about, the iPad could probably increase its speed more easily. It may even be technically possible for iBooks to turn pages faster on the current generation of hardware and software, but I suspect the default page turning was configured more for beauty than speed. iBooks offers very minimal ability to adjust the settings at present. It would be nice to amp up the page turning speed if that's possible.